Summary
Membrane roofs are often used in sports centres to protect the sports area from sun and weather. However, membrane roofs usually do not meet the requirements for thermal and sound insulation. This project aims to provide decision makers with comprehensive information on membrane roofs. One focus is the consideration of translucent thermal insulation materials, so that thermal insulation does not have to be postponed due to the desired light transmission.
Therefore, existing buildings with such roof constructions were analysed in the project with regard to daylight yield, flow behaviour, formation of thermal bridges and condensation problems. For this purpose, the interior of the hall and the technical building equipment were equipped with measurement technology. CFD simulations were used to investigate the flow and the possible formation of condensate.
In addition, a guideline for planners and decision makers of sports facilities was developed.
Results:
- For the combination of a transparent north facade and a translucent membrane roof, the highest savings for the electrical energy demand were achieved. Contamination of the membranes increases the electrical energy requirement for lighting.
- Due to the membrane and supporting structure, the problem of condensation and frost formation naturally occurs in the area of thermal bridges and the membrane itself.
- During the heating period, the translucent roof structure has lower operative temperatures compared to the opaque roof. Even in the summer period, the "classic" opaque roof construction proves to be more pleasant.
